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Fort Hood shooting: What we know now

Deadly shooting at Fort Hood

Three people were killed and 16 others were injured in a shooting at Fort Hood on April 2. The shooting suspect, Spc. Ivan Lopez, then committed suicide. This is the same Texas military base where Army psychiatrist Nidal Hasan shot and killed 13 on Nov. 5, 2009.

Staff Sgt. John Robertson, right, waits in a parking lot outside of the Fort Hood military base for updates about the shooting that occurred inside on April 2 in Fort Hood, Texas.(Photo: Tamir Kalifa, AP)

USA TODAY Network brings you the latest on the Fort Hood shooting which left four dead, including the shooter, and 16 wounded. Here's what we know so far:

Gunman: The Army said the gunman, identified as Spc. Ivan Lopez, was an Iraq war veteran who was being evaluated for post-traumatic stress disorder, but had not yet been diagnosed for the illness.

He was being treated for mental health conditions ranging from depression to anxiety to some sleep disturbance. He was prescribed a number drugs, including Ambien, said Army Secretary John McHugh, the U.S. Army's top civilian official. He was seen last month by a psychiatrist. There was no sign of likely violence and no suicidal thoughts. He had a clean military record.

Lopez, who was assigned to the 13th Sustainment Command (Expeditionary), was married and has three children.

Motive: Lt. Gen. Mark Milley, head of the Army's III Corps at Ford Hood, hinted at a motive for the shooting. "There may have been a verbal altercation with another soldier or soldiers," he said. "There is a strong possibility that that immediately preceded the shooting."

How the scene unfolded: Milley said a shooter walked into a Texas building in the 1st Medical Brigade at about 4 p.m. Wednesday and opened fire.

He then got into a vehicle, fired more shots from the vehicle, went to another building and began shooting, Milley said. When Lopez was eventually engaged by responding military police in a parking lot, he put the gun to his head and fired.

Bob Gordon works on a memorial for the victims of Wednesday's shooting at Fort Hood on April 3 at Central Christian Church in Killeen, Texas.(Photo: Eric Gay, AP)

Victims: Three died on Wednesday during the shooting. Sixteen are wounded. Three victims remain in critical condition with neck, spine and abdominal injuries, according to doctors at Scott & White Memorial Hospital, the closest trauma center to the post. The patients include eight males and one female. Doctors said they do not expect more fatalities at this time.

Security at Fort Hood: Soldiers who live in the barracks are required to keep their weapons in an armory. But those who live off post or in base housing can keep their weapons at home. Pentagon regulations require troops who live off base to register weapons they intend to bring on to the post. Those weapons can not be concealed and base security personnel conduct random checks, said Army Col. Steve Warren, a Pentagon spokesman.

USA TODAY's Gregg Zoroya talks to USA NOW's Carly Mallenbaum about soldiers' reactions to the Fort Hood shooting and their concerns about the stigma attached to soldiers who are treated for brain injuries.
(USA TODAY, USA NOW)